Deacetamide Linezolid PhthalimideLinezolid IMP (S)-N-[[3-[3-Fluoro-4-(4-morpholinyl)phenyl]-2-oxo-5-oxazolidinyl]methyl]phthalimide

Linagliptin AcetamideLinagliptin IMP 8-[(3R)-3-Acetylamino-1-piperidinyl]-7-(2-butyn-1-yl)-3,7-dihydro-3-methyl-1-[(4-methyl-2-quinazolinyl)methyl]-1H-purine-2,6-dione

Linagliptin Dimer ImpurityLinagliptin IMP 8-[(3R)-3-Amino-1-piperidinyl]-1-[[4-[[2-[[8-[(3R)-3-amino-1-piperidinyl]-7-(2-butyn-1-yl)-2,3,6,7-tetrahydro-3-methyl-2,6-dioxo-1H-purin-1-yl]methyl]-1,4-dihydro-4-ethyl-4-quinazolinyl]methyl]-2-quinazolinyl]methyl]-7-(2-butyn-1-yl)-3,7-dihydro-3-methyl-

Linagliptin S-Isomer ImpurityLinagliptin IMP 8-[(3S)-3-Amino-1-piperidinyl]-7-(2-butynyl)-3,7-dihydro-3-methyl-1-[(4-methyl-2-quinazolinyl)methyl]-1H-purine-2,6-dione

3,3’,5,5’-Tetraiodo Thyroformic AcidLevothyroxine Sodium IMP 4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodobenzoic Acid

Lidocaine Secondary StandardLidocaine API 2-Diethylamino-N-(2,6-dimethylphenyl)acetamide

Linagliptin N-BocLinagliptin IMP N-[(3R)-1-[7-(2-butyn-1-yl)-2,3,6,7-tetrahydro-3-methyl-1-[(4-methyl-2-quinazolinyl)methyl]-2,6-dioxo-1H-purin-8-yl]-3-piperidinyl]-carbamic Acid 1,1-Dimethylethyl Ester

Levothyroxine Levothyroxine API O-(4-Hydroxy-3,5-diiodophenyl)-3,5-diiodo-L-tyrosine

Levothyroxine Sodium Secondary StandardLevothyroxine Sodium API 3,3',5,5'-Tetraiodo-L-thyronine monosodium salt hydrate

LiothyronineLevothyroxine Sodium IMP (2S)-2-Amino-3-[4-(4-hydroxy-3-iodophenoxy)-3,5-diiodophenyl]propanoic acid